XRSession: select event - Web APIs 编辑

Secure context

This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The WebXR event select is sent to an XRSession when one of the session's input sources has completed a primary action. Examples of comon kinds of primary action are users pressing triggers or buttons, tapping a touchpad, speaking a command, or performing a recognizable gesture when using a video tracking system or handheld controller with an accelerometer.

For details on how the selectstart, select, and selectend events work, and how you should react to them, see Primary actions in Inputs and input sources.

Examples

The following example uses addEventListener() to set up a handler for the select event. The handler fetches the pose representing the target ray for tracked-pointer inputs and sends the pose's transform to a function called myHandleSelectWithRay().

xrSession.addEventListener("select", event => {
  if (event.inputSource.targetRayMode == "tracked-pointer") {
    let targetRayPose = event.frame.getPose(event.inputSource.targetRaySpace,
                              myRefSpace);
    if (targetRayPose) {
      myHandleSelectWithRay(targetRayPose.transform);
    }
  }
});

You can of course also set up a handler for select events by setting the XRSession object's onselect event handler property to a function that handles the event:

xrSession.onselect = event => {
  if (event.inputSource.targetRayMode == "tracked-pointer") {
    let targetRayPose = event.frame.getPose(event.inputSource.targetRaySpace,
                              myRefSpace);
    if (targetRayPose) {
      myHandleSelectWithRay(targetRayPose.transform);
    }
  }
};

Specifications

Browser compatibility

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